CVE-2026-103396

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Source
https://cve.org/CVERecord?id=CVE-2026-103396
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103396.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-103396
Published
2026-09-30T14:48:56Z
Modified
2026-10-02T03:47:25Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
bbs-go through 4.4.6 Incorrect Authorization via /api/admin/user/synccount
Details

bbs-go through 4.4.6 contains a permission bypass vulnerability in the AdminMiddleware authorization logic where the read-only dashboard.user.view permission rule matches the /api/admin/user/synccount endpoint before the intended dashboard.user.update rule. Authenticated users with only view permissions can call the synccount endpoint to trigger expensive full-table user recounts and cache invalidations, causing denial of service through repeated concurrent database operations.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103396.json"
}
References

Affected packages

Git / github.com/mlogclub/bbs-go

Affected ranges

Type
GIT
Repo
https://github.com/mlogclub/bbs-go
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7745195925f2094d1f37a1d7bbf13837fa948898
Fixed
97d0bb3dcbacd686fd5300295afbf4f4a5da7609
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "4.4.6"
        }
    ],
    "source":  [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

3.*
3.3.2
3.5.4
v1.*
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v2.*
v2.0.0
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.0.6
v3.0.7
v3.0.9
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.1.7
v3.1.8
v3.1.9
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5
v3.2.6
v3.3.0
v3.3.1
v3.3.2
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.5.0
v3.5.1
v3.5.2
v3.5.3
v3.5.4
v3.5.5
v3.5.6
v4.*
v4.0.0
v4.0.0-beta1
v4.0.0-beta2
v4.0.1
v4.0.3
v4.0.5
v4.0.6
v4.1.0
v4.1.1
v4.1.2
v4.3.0
v4.3.1
v4.3.2
v4.3.3
v4.3.4
v4.3.5
v4.3.6
v4.3.9
v4.4.0
v4.4.0-rc4
v4.4.0-rc5
v4.4.1
v4.4.1-rc1
v4.4.1-rc2
v4.4.1-rc3
v4.4.1-rc4
v4.4.2
v4.4.2-rc1
v4.4.2-rc2
v4.4.2-rc3
v4.4.2-rc4
v4.4.2-rc5
v4.4.3
v4.4.3-rc1
v4.4.3-rc2
v4.4.3-rc3
v4.4.4
v4.4.5
v4.4.5-rc1
v4.4.5-rc2
v4.4.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103396.json"